Breech-loading and discharge-actuated firearm.



BEST AVAILABLE COPY S. N. MGCLEAN. BREEGH LOADING ANI) DISCHARGE ACTU APPLICATION HLED JULY 30, i905.

Patented 0@t.22,1912.

NU www@ l 9 SHEETS-SHBBT BEST AVAILABLE COPY MCGLEAN. BREEUH LOADING AND DISCHARGE -AGTUATED mmm.

APPLIOATI-H ILBD- JULY 30, LSIUG. 1 4

Patentea 0013.22, w12.

. 9 SHEETS-SHEET 2. Lo n y INI/ENTO/e N, MUOLEAN, BEST AVAILABLE CCPY EREBGH LOADING AND MSGHARGE AGTUATBD mmm. PILIOATION TILBD JULY 30, 1906.

1,942,363, Patented 0013.22, 1912.

9 SHEETS--SHIJET 3.

Wf-TNEF 5. NVENTOR BEST AVAILABLE CCDPYl S. N. MGGLEAN. BREEGH LOADING AND DISCHARGE AGTUATBD PIRBARM.

APPLICATION FILED JULY $0, 1906. 1,9%;363, l Patented oct. 22, 1912.

D SHEETS'-SHEBT 4.

/ x W5 [NVE/WOR BEST AVAILABLE COPY S. N.. MGGLEAN. nimma LOADING AND DISCHARGE AGTUATBD Hmmm.

APPLICATION IILBD JULY 30, 18,06.

Patented Oct. 22, 1912.

9 SHEETS-SHEET 5.

l A l attain u.:

BEST AVAILABLE COPY S. N. MGGLEAN. BREEQH LOADING AND DISGHARGE AGTUATED HREARM.

APPLIUATION FILED JULY 30, 1906. l ya, l yatented 0013.22, 1912.

9 SHEETS-SHEET B.

- l 511 nudo? 5l/@i hwoam j BEST AVAILABLE COPY s. N. MOGLBAN. BREEOH LOADING AND `'JISGHARGE AGTUATED PIREARM APPLICATION ILBD JULY 30, 1906,

Patented Oct. 22, 1912.'

,9 SHEETS-SHEET 7.

' mwa www a N' MOGLEAN. BEST AVAILABLE COPY DREBDH LOADING AND DISCHARGE AGTUATDD mmm.

f APPLICATION FILED JULY 30, 1808, 1,042,363, Patented Oct. 22, 1912.

. jog-L .f7.1 wf; am nu /D @j s. N. Mmmm; BEST AVAILABLE copy BRBEGH LOADING AND DISCHARGE AGTUATED PIRBARM. i

APPLICATION YLEU JULY 30, 1906. 1,042,863, Patented 0013.22, 1912.

9 SHEETS-SHEET 9.

"Hummm y /g 15" tion @tt AVAILABLE coPY ,sanonnnjivrecnnem or CLEVELAND, omo. Assrenon,

BY MESNE ASSIGNMENTS, TO

THE AUTOMATIC ARMS COMPANY.

" BREECH-LOADNG'AN'D DSCltIARGE-ACTUATED FIREARM.

igoaaaea.

To all whom 'it may concern:

Be it known that l", SAMUEL N. MCCLEAN, residing at Cleveland, in the count)T ot Cuyahogaand State of Ohio, ha ve made certain 5 new. and useful Improvements in Breech- Loading and Discliarge-i-lctuated Firearnis,

of which the following is a specification.

My invention relates to breech-loading and discharge-actuated guns, and more particultf larljf to machine guns.

`The obiect of the invention is to iinprore i andsimp ify the construction of these guns, and to obtain 'certain military, mechanical andmanufacturing advantages in connec- With the feeding, lil-ing, ejccting, and operating mechanism ol these guns. 4 i The more specific object. of the invention is to construct a' gun. in which the -brecch mechanism and the feeding, tiring, 'and ejectng mechanism shall be operated and controlled bya single operating slide; also to provide devices for utilizing the powder gas; also to provide an interlocking form of meclwnisniwhich may be removed bjr hand, andy 'Without tools; also to proiidevthe gun with a. `.novel .form of cartridgemagazine and n'iagazin'e feeding mechanism.

further objectof my invention is to construct. a. machine gun in which the construction and combination of the operating and .fartridge feediiw mechanismshall be such as to remedy the diiliculties ofclogging and breaking, existing in machine guns oi the well-known type usi-ng a cartridge belt leed; also to do away with the complicated mechanism used in ooerating the cartridge belt, and inpassing tile cartridges from the belt into (lie breech chamber of the gun, and in extractin and ejecting the shell; also t0 remedy tiediflic'ulties' of the cartridge belt feed 'due to dust and rust and moisture or dryness, causing excessive tightness or looseness of the cartridges, with the resulting .clogging of the feed, when a part of the feed mechanism is made either of a. canvas or flexible metal belt; also to provide a cartridge feeding mechanism ol. Asimple. construction which shall compactlllv retain a large amount of ammunition, and loosely, .individually and positively retain, control and feed each consecutive and succeeding cartridge. -f

For the foregoing purposes I have constructeda dischargelactnated machine gun having a breech bolt and operating part en- Specication of Letters Patent. Application filed .Tuly 80, 1906. Serial No. 328,320.

Pa touted (lc-t. 22,1912.

gaging with a helical drum feed forcensecutirelY and positively retaining and controlling the feeding and. tiring 'of thefcartridges.

In the acc-oinpanyingl dran-ings, I have shonn the invention in 'the form of a gasactuated machine. gun, adapted to lire standard musket annnunition. These drawings are, however, for the purpose of illustration, and the invention is notlilnited to the precise construction shown in the drawings.

Figure l is a longitudinal 'central section of a muslcet machine gun and magazine feed, with the right-hand side of tl'xefgun removed. showing theV piston rod and trigger mecha; msm in elevation, and the breech boltin central section, and a broken sectional View of the magazine with the cartridges in 'eleration. Fig. 2 is al side elevation ol the rear portion of the gun taken from the side opposite to that-'from which Fig. l is taken. Fig. is a transverse section of the gun on the lines c-c, Fig. 1 looking to the rear. Fig. et is a broken .sectional View of the gun on the lines cZ-(Z,

feed mechanism however being shown in cleva'ion for the sakeA of clearness.' Fig. 5 is a plan vieu' of the cartridge magazine, partly breken away, and showinoP the. cartridges in elevation, and the yielcing abutment for the cart-ridges in transverse sectional View. Fig. (i 1s a plan View ofthe housing for the yielding abutment-- Fig. 7 shows a plan View, side elevation, and'cnd View of thel yielding abut-ment. Fig. 8 is an end elevation of the housing for the yielding abutment. Fig. 9 is a detail View of the end of the bearing of thebell crank 1ever. Fig. 10 is a broken, longitudinal, central section of the forward end of thegun, showing the gun barrel and Water jacket, the gas muzzle for controlling the recoil` and the piston and cylinder for operating the slide.

the `water jacket and controlling valves. Fig. l2 a broken sectional vieu' oli the cartridge magazine fced,sho\\'ing the cartridges in elevation, and the abntmei'it the cartridges integrally. formed Iwith the gou frame. Fig. 13 is a. broken sectional. View of a modified form ol the ezntridffe-inagazine, showing a sheet incl-al construelion` ot' the :niger of the magazine, the View being partilbr in section. Fig.

ot' Fig. l, looking to the` front, certain of the paris of the magazine Fig. ll is a broken sci :tional View of.

t4. is a broken 110' ing 3S' into the lower chamber tor the -dis- ":eliii'irgept the shells. ,'.lhe o'1wrat1n-gslide 5ft, with its piston tt (Fig. 10), tubular piston rod 5- t,and spring eonstitutes a 'single operating part through the reeipreeatioi'i ot which the Cartridge ted vinto position. puslniilA into the breech ot the .gun barrel, the breeeh closed b r the breech bolt, the Cartridge .tired and Ithe shell withdrawn and ejer-teil.- The pi ton Gti'is at the forward end et the piston rod :Ti-l which 'extends forward from the slide This piston lits; and `adapted to reeiproeate in the Lfas cylinder 31, and reeiproeated in one direction b "the spring (i3 and in the other direetion by the gases oi diseharg'e. The spring- 63 bears its forward end against the rear face of the piston and its rear end bears against an abutment 62 through which the piston red slides freely,-

the abutment being held against .movement when the gun is to be used, as hereinafter described.

The hollow head 29 niwlneh the forward end ci the cylinder 31 is secured is-ln veonnnunieation with the bore of the aan barrel l through openings 2T through whieh 'a portion of tlhe gases of dischi rge Venters thejliollow head and acts npo'n the piston G6 'to drive it rearward against the force of the Spring The for ard end of the hollow head 29'is closed. in any convenient manner', pre'ferabl)r by a hollow screw plug 30 provided on its flange with openings 52 so arranged ,that by unscrewing the plug these openingswlll he more or less exposed to 'permitthe' escape through them. of the excess of gas taken into the gas o vlinder.

Itwlll benpparent. thatfwhile the projeetileis passing through thezportlon of the barrel-'between the openings 2T and the muzzle it will mo'mentaril \r 'act as a valife to check the escape of the'gases and divert a,

portion of them throufljh` the openings 2T into the gas cylinder to drive the piston 66 rearward.

The' o Jerating slide-5l is provided on its lower er ze with a guide rib 5?)` preferably of considerable relative. width as shown which fits and reeiproeates in a longitudinal guide groove L14 formed in the bottom of the lower Chamber. 'This guiderib is eutaway on its under side near its rear end to torni a. 'vertical' shoulderO and an ineline leading rearward 'to this shoulder, and is cutaway nearits forward end to forni a vert-ical lshoulder 6l haringen incline leading forwad'to the lower edge ot this shoulder, both or' these shoulders being adapted to be engaged by the sear as hereinafter described.

'0n its upper side near its rear end the operating slide has an upwardly projecting arm BEST AvAaABu-i COPY wnlen extends through and is guided in a guide slot 12 eonneeting the upper and lower elmnibers, and also extends int-o the receiver i 2 through the slot. T. This arm 55 carries at .its upper end-the firing' pin 5T and has.

l in its rear end the operating' slidefis pro-- vided with a eireular plate or dish ada*` ed to tit the interior of the cap 18 to fern! with it a dash -pot to absorb the shock of the rearward morement ol.' the slide the eap lie-- ing?y provided. with an annulargroove :El to forni .a clearance :tor the dish 5f). On its face which toward the door 10S. the slide 51 A has termed therein a eam groove 5S which has its middle portion inclined upward toward the rear terminatinso)- atitsttorward -end in a horizontal portion. rl`his cani groove is adapted to reeeire a pin 103 on the rear end of the horizontal arm of a bell crank lever which is pirotall)7 mounted on. the hinged door 109 and is adapted as hereinafter deseribed to rotate the cartridge magazine. The faire of the slide opposite the side on which the Cani groove is 'formed is inclined outward :towardthe lower edge 4forming a detieetor 65 the lower edge of whieh is in iine with the discharge openinn,` 38.

'.lhe abutment GQ is preferably enp shaped asshown on its torward tace and is eirealaixin. cross-section and adapted to tit the interior of the gas cylinder 31. On its rear face the abutment is provided with an extension 62 having at its rear end a cani shcmlder (S4: adapted to be engaged by an arm 156, carried by thel door 109, when the door is in closed position.

rl`he breech bolt- (SS is arranged to have both reciprocating and rotary n'iovement. The forward end ot the breech bolt issolid except for a central tapered opening to receive. the firing pin ln rear ot this solid end the breech bolt bored out as shown at T2 and this bored ont portion is slotted in its lower side to form a eain slot 73 haring'- tll SdGS lli?) and Of it'SffOiwaijl portie-n parallel with each other and in line with the axis of the breech. bolt. The rear portion et the cam slot has a portion 171 parallel with the axis of the breech bolt but in a ditlerent plauefrom portion 169 the portions 169 and 171v being connected by a. rain-incline 7l. The straight portion 170 extends farther to the rear than does the straight. portion 169 and terminates in a Cain 172 inclined rearward and toward the portionll terininats ing about in line with the straight portion 169. duced in thickness so as. .to enter the earn slot. y Y The breeehholt is lprovided on its exterior with longitudinalri 'is 70 provided' iiitheir forward portions with locking lugs forming interrupted screw-threads adapted to enl The up}')er' end ot the arm is re- Which-e1@ sters-991s formed. This nigga# 82 is pivoted on a pin-941011 which it is also permitted to have longitudinal movement.

l spring 96 connected at one'end to the triv- 3 5 ger and at the other Iend to a. pin 126 holds the trigger normally in its forward position with its hooked end engaging the shoulder 12d of the extension 84,' On the underside of this trigger forward of its pivot is formed a cam-'97 which, as the ytrigger is pressed, comes in Contact with a pin 98 and as the pressure is continued the trigger is forced rearward against the force 'ofl the. spring 96 causing its hooked end to slip rearward oil" the shoulder 1211 ont-he extension 84C and rest on the lower shoulder 1211 of the. extension, the tooth '83 of the scar being thus allowed to be pressedupward by its .spring 87 to bring it intoposition to engage the shoulder 60 but not suliicient to permit it toengage the shoulder 61 so long as the end of the trigger presses on the shoulder 124i. The operating slide will thus be permitted to be forced rearward by 25 the gases of discharge and .tomove forward to force a cartridge into the breech andl close the breech, the forward part of the o erating slide passing 'over the tooth 83 without engagement, the operating slide, however, 3o being stopped in firing position by the engagement of tooth83 with shoulder 60. `By this arrangement the trigger 82 may be' used for semi-automatic liring.- 4When 'it is desired to dispense with the 35 `cartridge magazine and insert cartridges .one by one by land, the forward end of trig- -ger 82 is pushed over to one side by means jof a cam 101 carried b f a lever 100 pivoted .fon the linger guard, so that it will be out of When 4o' the path of the lower shoulder 12%.

been

Aso arranged after the trigger has pressed to re a shot, its end'will' slip offthe shoulder 124e and the free end of the scar will rise bringing its tooth 83 intoposition to engage thesho-ulder 61 as the operatin slide begins to move forward after it y has een forced to its rearward positionby the gases of discharge thus holding the brocoli open for a cartridge to be inserted by '50 hand through the slot 5. ,On releasing the pressure :on the trigger, its forward end resumes its position above the shoulder 124 and on again pressingthe trigger .the sear is 'pulled down to release the operating slide. The gun barrel lis preferably provided at the muzzle with an attachment for checking recoil consisting ofv a. hollow extension 14:8 screw-threaded onto the muzzle having" an opening V14:9 in line witlrthe bore of the gun'and a series of openings 150 in its periphery for theeseape of the gases .of dis l charge. I

The cap 18 by Awhich the rear end of the gun frame is closed is connected to the gun frame by screw-threads 19 and is provided jacket.

`the piston rod 54', piston 66 and spring G3 ,ing dish 107 carried on a pin which is pref- BESTl AVAILABLE COPY with an extension adapted to closethe rear end of the. receivei` 2. The extension is adapted toV engage a lug 20 on the gun frame atthereareDd of the. receiver when the cap 18 is screwed into position to close 70 the end of the gun frame. On its rear face the jcap is provided with Vlugs 21 forming between them a slot adapted to receive a .bar by which the cap may be screwed into closed position or unscrewed. i 7g The hollow-heads 22 and 23 of the water jacket are preferably each provided on theirV upper sides with an opening 25 controlled by a ball valve 167, the ball valves being so arranged that they will permit the entrance of water and will permit the escape of steam but will not let water escape at whatever-- angle the gun' may be elevated or depressed. The head 23 preferably has in its under side an opening closed by a screw plug 28 to 85 permit the water to belet out from the water The heads'22 and 23 are held together by rod46 screwing into socket 45 in head 22 and having nut 4.8 at its outer end. The operating parts of the gun are so constructed as to be readily assembled and disassembled without the use of wrenches or other tools. j In order to disassemble the gun cap 18 is first unscrewed. On the removal of this cap andthe opening of the door 109 the arm 156. is withdrawn from engagement .with the shoulder G4 carried by the abutment 62 and the operating slide 54 with the abutment 621 play be withdrawn through the rear end of the gun frame bringing with it the breech.

bolt which iriay then be lifted oil the upper end of the armf. f

The door 109 is hinged to the gun. frame -105 by means of a. removablepintle 115 provided with a groove 11G Vwhich when the )int-le is in position is in line with a hole ormed in hinge 'lug 17I to receive the pin 117, the end of which enters the groove 116. When the door is closed this pin 117 is covered u by shoulder 118 of the'door and cannot fa l out. When the door is opened the pin may be readily removed andthe pintle ll'may then be withdrawn and the door 115 removed.

The short shaft 104 on which the bell cranklver is pivoted is preferably: formed integral with the door 109 andl projects inward tl'ierefroin. Near its inner end it is turned down to form a shoulder on which is carried a torsion spring 106 one end of wh ich 'engages a hole in the shoulderV and the. otherend engages a holein a lockv erably screw-threaded'into the end of the short shaft 104;. .This dish 10,7 has on one si'de a .lug 108. The bearing formed in tbe bell crank lever to fit. the short shaft 104: hasl a key-way 157 on one side adapted to re-13o Loteries ceive the'flug'lOS and at the inner end of this key-troyen offset 158 is formed adapted to. receive the 'lug 108 into which it, is turned :by the spring`(5 thus locking 4the .bell

preferably 'provided iii'it-s face .with -ai erankleveragainst removal, the spring'- also :Loting thro-ugh the locking .disk 10T and its lug 10S to swing the vertical erin 102 towii'rd the muzzle of the gun4 The.l dislt' 10? -the bell crank' lei-'er and is pressed upwardly lf3 a SPlllgv 113 carried in u. elminber formed 111. the pa'wl. 4 l The pivot 130 on which lever 129 Swings,

is providedut its free end with radial lugs -131 'i1-nd the beiring in the lever which lits oi'er the pivot 130 is provided withleyovnys lis '132 adapted. to receive' the lugs 131`.but soA loe'zited that they will not be in register with th'ellugs-When' the lever is in ollueratife position."'Afte'1 the bell crank lever has been removed the lever 12S) may be read-ily swung to bring thekey-Wnys 132 into register with the lugs 131 when'the lever may be slipped ott' its pivot. I V .p

ln ns'semhli ng the parts carried by the door 1091 the level.' 129 and its spring are first placed in position und .the hacking disk 107 is thenturned by a screw driver against the force of the spring 1013 to bring' its lug 10S in line with' the key-Way 157 when the bell .c 'zink .lever may be. pushedonto the' shaft- 1'0-1. As it reacties its operative position the lngl 108 passes into the offset 15S locking the bell crunk lever against removal. [n assembling'these pnrts'enre should be taken to see that the tail piece of. the lever 129 is above the horizontal nrin 102 oi the bell crank lever before the bell crank lever is pushed fully buck to operative. position.

The door 109 is locked in closed position by n, Spring latch 159 of any convenient construction` engaging' :i notch formed in the under' side ol the fiat portion of the gun frame. u

The operating slide 54: und its connected ports, after being- Withdrawn through the open end of the gun frame, muy be. readily disassembled. For this purpose the piston GG (Fig. 10) is constructed with :i screwthrended hub adopted to screw into the end of the piston rod 54.- and the piston provided on` its inner foce with n hole 6T adaptedto register with :i hole in n lng 16:3 on the end o' the piston rod. The spring 63 has its forward end bent into line with the axis of they piston rod und this bent end is adopted to extend through the hole ot thelug 16o intothe hole 6T inthe piston when the pisspring.

esst AVAILABLE COPY ton issorewed into position, thus looking the piston against unscrewing. In' order to dis! assemble the parts the spring 631s pressed bneknntil its forward end 'is .Withdrawn from the holes in the piston' andin the lug 165 andthe piston is then unserewed and removed.V -The spring may then be slipped ott thepiston rod, nndthis being removed the abutment Glnay then be "slipped oli. These parts may-be rendilyreessembled by -tirstslipping the abutment intol position, then slipping the spring onto the piston rod and' In'ally screwingthe piston into position and locking it by mea-ns'o't the bent end of the The cooking slide 33 is for the purpose of drawing boel: the 'operating slide to open the b reeoh'to permit the firstcartridge to be.

inserted and fired. Aft-er ithas been drawn back to drew boel: the opeiiting slide `itshould be .returned to its forward position and its handle turned down to bring its shank into engigement with i-locking noteh 36' which extends dojvnn'ard `from the slot 32: A l.

The spring 87 which presses thefree end of the senr upward is carried b v a.. pin 8S preferably having :t milled head 91 on its enter end, the upper end ot' the spring fit-ting into a recess in the. under side of the Sear. The .pin is provided with opposite laterally projecting lugs i The under side ot' the portion ot' the gun frame in which the bearing for the journal .S5 of the senr is .termed is .ent atv-ny to forni an open slot lltlnough Whielrthe senr may be inserted into operotive position. InV the tvallsof this slot let are formed opposite recesses adapted to pernntthe lugs .90 to turn treeljv in them und having opposite locking' notches to receive the lugs 9i) and in which theyr are held by the tension ofthespring S7.

In placing the senr in operative position `its for fard end 85 is inserted through-the 'slot lt' into its hearing und the rmi-end of the senr pressed upward. 'lhe spring. S7' with its pin 8S isthen insertedwiththe lugs 90 in line with the slot Ll and pressed I lpwnrdA against the force of the spring until the lugs are oppositethe recesses when the-pin is given-ti quarterrr turn which brings the lugs in line with the notches into which theynre forced b v the spring. thus looking the pin und With it the senr against removal.'

The triggers S1 und Si* are :adapted to' be readily' inserted 'and removed without the use of tools. The slot let extends rein'wnril and is of snlioient width to receire'tbe trie;l

gers side by side :ind permit them to more. freely on their pivots. 'lhe trigger S2 whicln ns above describedadapted to momentarily depress the senr to tire o single shot, is first placed in position by inserting its linger end intothe lett-hand side of the trigger. recess from the front, slipping the forward eud of its spring 96' over its pin 12C and drawing the trigger rearward until the lug 95 on its upper side ie in rear of the pivot pin 94C which is ofla length corresponding to the thickness of the trigger and preseing'the trigger bodily over to the left until it is aga-inst the Side of the trigger reces" The spring 96 willz then draw the trigger' '1g the lug 95,:1nd the upper;

forward to embrace the pivot pin' between edge of the trigger.

' The trigger'l may theuhe placed in' posi tion by inserting its finger end from the front int-o the trigger recess raising the trigger .sufficiently to bring the lug on its vupper edge above the pivot piu`92. When the trigger' 81 is in position the trigger 82 will Ybe held against movement. to the left to slip oft' its pivot 9e.; rEhe triggers will, of course, -be inserted 'in position before the scar is placed in position and the scar when in operating" position 'locks the triggers against removal. l

The detent pawl 136 is preferably constructed to he capable of'being readily detached Without tools. It'is carried by a hollow rod 137 in which is located a, coiled Springthe r'od 137 fitting in a socket 138 se` cured to the gun .freine beneath the flat portion' or table. The opening in the'- flat por- .3@ tion 26 of 'the gun frame thro-ugh which the i adapted to readily pass through the slot 14,1

and the middle portion of rod 13T is preferably roughened for convenience in handling. In order to place the pewll' in operating position one end of the spring inserted in the hollow rod 137 and the rod and spring is pushed through tion of the gun frame into the socket 138 und the lug 140 is brought in line with slot. lll.. 'The pawl and its rod 137 is then pressed down against the force of the spring until the head: of the pawl is below the under surfacc'o'f the flat portion of the gun frame -when the rod is rot-ated lto bring its lug let() in 4line with the recess eti into which itfie' forced by the spring.

rl`he spring catches 154; for locking the cartridge magazine in position are euch preferably carried in :i 4socket on the outsideof the cylinder' 1G with its sockct'encl nor- .lnally project-ing through an aperture iu the side of the cylinder to engage-the llauge '155.

In assei'nbling the operating partsI ofithe gun, the triggereand det-ent pau'l 13G will he first placed in position. The operating parts carried by the door 109 may then be conveniently aesembled vih ile the dot.' iedethe opening in the llat pou ee'f AvAiLABLE COPY tnched, and the door then placed in l pt isitiony andthe pntle 115 inserted, the door being left open. lhe operating slide with 4the piston and piston rod5 having been ossembled, 'may then be placed in position by inserting the piston in the rear open end of the lower cl'iamber of the gun frame and 1 mehing it. forward the operating slide being so placed. that its' guide rib 53 will enter the guide groove 4 4. As the operating slide with ite connected parte is pushed forward it will. lie necessary to deprees the Sear to permit the guide rib to pass freel7 forward. hire the lu'eech holt. reaches the rear end the receiver the cooking slide should be inserted in its guideway with its handle swung upw'nrd. As the forward end of the breech boltreeches the end of the receiver the handle of ,the Cookino' slide should be swung over to the left. i. s the breech bolt is pushed further forward .its ribs 70 ent-er the grooves or guide-ways 8 and as the o ernting slide is pushed further forwar it a l carries the breech bolt into the receiver and :alec carries forward Awith it the cooking slide. The cap 18 ma;r then be screwed to closed posit-ion. A cartridge magazine previouslivr loaded with cartric ges may then be placed in posit-ion in the cylinder 16, and the drum 121 should be rotated by hand uutil a cartridge is brought aga-inst the abut-- ment 1.61. The door 109 may now be closed bringing the end of rin 156 into 'engageihent'u-'ith cani shoulder Git on the rearward extension G2 of the abutment 62 putting the spring (33 slightly under tensionl and locking the abutment against rearward movement. ifhe eloemg of the door also brings the pawl llt) into position toeugage the teeth 135 of.

The gun is Vnow ready for the .inzaghi/.ine

operation. When it is desired to lire, the

handle of the cooking slide is released .from its notch 35, and the shdc drawn back .di-:living with it -the operatie slide and its eminecting pa1ts,`i1ielruling tie breechbolt, sind, through the canti groove 58 'and the bell frank le\fe1r,'ca1ising the magazine to. be rotated to force n cartridge against the cam :huye i613 of the. yielding abutment l61'and doiwnwnrd :into the slot'V 5 of thereceiver where it engaged by theretainih wings l. As the coc-king slide is returnedto ts` initial position the operating slide will follow it under the action of the spring 63 un -l'il the shoulder 60 is engaged by the 'sean [n this forward movement ofthe operating .tilde tl ,-i breech holt is puhed against the huttot thecartridge' carrying it forward into the breech of the g'un and the breech holt is rotated ny the action of the upper end'of the m1111551 on the com incline' of its slot 73 to lock it against rearward movement. .()n now pressing the trigger 82 the scar is withdrawn from engagement with the shoulder and the slide 54 permitted to be 45 spring (i3.

pass into the torn-'ard end ot' the ga e'ylinder through the'openings 557 and drive the piston 'terribly to the rear and with .it the operating slide. unlocking` the breech holt and withdrawing it, c:.i11 yiiigj'witli it the 30 empty shell of. the. cartridge and lninging cani 168 of the ejector 75 against the earn l0 forolbly'ejeeting the empty shell which is guided to the discharge opt-innig 1 the V UO by ninlined 'face 65. The rear'ivard infn-ement of the operating' slide also causes the maga-- zine to bel rotated to -teed another cartridge into position to 4be pushed'into the breech. As the operating 'slide nears the. end "of its rearward nioveinent; its movement is'checked 2Q and stopped. by the resistance to the entrance of its disk 5t) into the cap 1S and by the resistance; of the spring-r tiff, and i'tat once begins its forward movement, pushing the eartridge into the breech, itz-cking' the breech bolt and being stopped by the .scar engaging the shoulder Gt? ready to be released by pressing the trigger to again tire a shot.

lf the trigger 8l pressed and heid when the giur is cocked the cartridge will be iired 3011s before and the operating` slide will be pushed. rearward as before to unlock and open the breech, 'witlnlraw the. empt)v shell Vand eject it and cause another cartridge to be, fed into )osit-ion, but as the operatingl slide moves toru'ard, the senr l-eing ont ot the n'ay'of lthe shoulders (it) and (51., the eartridgeavill be tired at once and these operations will be repeated as long' as the trigger 8l pressed and the supplyv of cartridges holds out.- The cartridge magazine may be made to hold any desired number of cartridges, preferably2:10, and the rapidityY of tire when the trigger S1. pressed and held will depend somewhat on the strength of the A speed o1 .fire of 2-t0 per minute may be readily'secured;

lt Will be notedy that the feed of the can tridgc to the receiver is* positive and is not dependent on gravity and conseqilently the.

.feed will take place with regularity and certainty whatever the elevation of depression of the gun.

In Fig. 1.3 the helix 113 ott the auger of the cartridge magazine is shown as formed fron istrips ot sheet metal haring the inner edges. held. in grooves in the inner Cylinder `11i). instead ot being` solid as shown .1n

l'fie'. 1. Y

The cylinder ot' the -ater jacket may be connected to the heads 22 and 23 by seroit-thieads vlf as shown 'in F 11.

Instead ot' having; the drum 121 arranged to rotate as shown. iu Fis'. L and having the shelf 143 formed on'a central anger, this shell ma)- be. arranged to extend inward from the drinn as shown in Fig. 22 the-drinn being stationary, the vertical wings 122 in this ccmstrutztion being carried by the eentral meinliier positive-l)T rotated. by suitable driving mechanism and acting on the bul let ends of the, cartridges.

rlfhe auger may itt preferred be constructed as shown inv Fig. o1 sutieient diront-rter to receive the eart-riiilges and instead'oi the vertical wings 122 the drain 121 maiT be provided with an arm 172 ve1.'ticall v movable in a guide-Way 171 formed on the inner 'face of the drnnnthis arm extending i'iiii'a'rd into the space 1.12 and engaging'ithe uppermost cartridge and as the drum rt'itates, wishing the Whole .mass of cartridges forward.:

It. preferred the movable abutment GQ i may be dispeneed with and a fixedV abutment lt() substituted as shown in Figs'. 1'2

and or'as` shown in Figa'?, the auger n'iay' guide be forment with a :in'ved end 175 to the cartridges to the. slot 5 of the ljtfceiver.

-1n l? Vl5 I have 'shown the vertical Wings .122 ormedh)- a continuons.stripof .sheet metal secured iu any convenient manner to theinner tace o1 the drain 121.'

.instead of the arrangement .ofthe bell crank .lever sirinigiirgr on anaxis 'at right? angies to the longitudinal axis of 'the' gun it. nia)v be arranged to swing on an axis parallel with the axis of the gun as shown'in Figs. 15 and 1li. In this modified construction the upper end of thej'ertiealiarnilOQf ot the bell crank lever en e'ages a horizontal sliding' pawl 171 arranged to slide in a recess 177 formed in the gun frame and llav- 17S) extending radially from the lou'er edge ot the drum 121 being pressed against the drain by spring ISO'. rFhis sliding paivl 176 has a 1a-m slot 1.81 formed in :its free end with which engages a pin 189. carried by a Jerking pau'l pivoted at 151 and haring a tooth 185 which when tbe end carri-'ing the pin 182 is forced toward the drum as the sliding panl 176 completes its stroke enters between the teeth 179 to stopl the rotation ol the drain, the locking pan-'l also having an extension 186 at its end opposite that carrying the piu 182, adapted, when the end carrying the pin 182 swii'igs away from the. drum, to einer between the teeth v 179 'and prevent rearward rotation. of the drum.l

1tJ is' obvious that. many other modica-` tions' and arrangen'ieut of partsinay be made.

without dt-rparting from the spirit of the in# adapted to/operate the breech mechanism -inechanisim a reciprocating (iiscl1:i1'gei-acti1 and havinga cam guide thc iength of which corresponds with the extent of movement of said slide, a rotary cartridge magazine, and. n'ieans in continuous enga-gement with and actuated by said cam guide for roti-:ting the cartridge magazine to thereby .tr-.ed car tridges to the breech mechanism.

2. In a gun, the combination of breech .|necl1anisn1, a. reciprocating opera-ting slide adapted to operate the breech mechanism and having a cam guide the lengt-h of which corresponds with tbc extent of movement of said slide, a rotary cartridge magazine, a feed pawl for rotating tbe cartridge magazine to thereby feed cartridges to the breech mechanism, and means for actuating said feed pawl, said means having a lnojecticn in continuous engagement with said cam guide. V

3. In a. gun, the combination of breech mechanism, a rotary cartridge. magazine, a reciprocating operating slide adapted to operate the breech mechanism and haring a cam guide 'the length of which correspoiids with the extent of movement of said slide, a feed pawl for rotating the cartridge magazine to thereby feed cartridges to the breech mechanism, means for actuating said feed pawl, said. means haring a projection in continuous enga-gement with said cam guide, and a stopping pawl controlled by said cam guide to stop the rotation of the cartridge magazine.

54. In a gun, the combination of breech mechanism, a reciprocating discharge-actuated operating slide adapted to operate the breech mechanism, and having a cani guide the length of which corresponds with the er:- tent of movement of said slide, arotary cartridge magazine, and means in continuous engagement with Aand actuated by the caui guide for rotating the cartridge' magazine to thereby feed cartridges to the breech. mechanism.

5.111 a gun, the con'ibination of breech mechanism, a reci'irocating discllarge-aetuated operating slide adapted to operate the breech mechanism and having a cani guide the length of which corresponds with the extent of movement of said slide, a rotary cartridge magazine, a .feed pawl for rotating the cartridge magazine to .thereby feed cartridges to-thc breech mechanism, and means for actuating said feed paivl, said means having a projection in continuous 4engagement with said cam guide.

(i. In a' gun, the combination of breech ated operating slide adapted to operate the breech mechanism and having a cam guide the length of which corresponds with the extent of movement of the slide, a rotary cartridge magazine, a feed pawl for rotating the cartridge .magazine to thereby feed car- BEST AVAILABLE COPY tridges .to the breech maga-zine, means for actuating said feed pawl, said means having a. projection in continuousv engagement with said cam guide, and a stopping pawl controlled by the cam tion of the, cartridge magazine.

7. Ain a gun, the combination of breech mechanism, an operating slide adapted to operate the breech mechanism and having a cam guide, a. rotary cartridge magazine, and means :netuated by the cam guide for r0- tating the cartridge magazine to feed a cartridge to the breech mechanism, themcans for rotating the carridge magazine being carried by a hinged door-so arranged that when the door is open said means Will be ont of engagement with the cartridge maga zine.

8. In a gun, the combination of breech mechanisn'i, an operating slide adapted to operate the lneeeh mechanism and having a cam guide, a rot-ary cart-ridge magazine, and a feed pawl actuated by the Vcam guide for rotating the cartridge` magazine to feed the cartridges to the breech mechanism, the feed' pawl being carried by a. hinged door so arranged that when the door is open said feed pawl will be out of engagement with the cartridge magazine.

9. In a gun, the combination of breech mechanism, an operating slide adapted to operate the breech mechanism and having a cam guide, a rotary cart. 'idge magazine, and a. feed panl actuated by the cam guide for rotating the cartridge magazine to feed the cartridges to the breech mechanism, and a stopping pand ,controlled by the cam guide to stop the rotation of the cartridge mavazine, the feed pawl and stopping paw] being carried on a hinged door so arranged that when the door is o en the pawls will be out of engagement wit i the cartridge magazine.

10. in a gun, the combination of breech meclianism, a reciprocating operating slide adapted to operate 'the breech mechanism and having a cam guide the length of which corresponds with the extent of movement of said slide, a rotary cartridge magazine, a feed pau-'l for rotating the cartridge.magazine to thereby .feed mechanism, means for actuating said feed pawl. said means nhavingak proliection in continuous enga-gement with said cam guide, and a detent` pawl engaging the cartridge magazine to prevent backward movement.

y l1. In a. gun, the combination of breech mechanism, a reciprocating operating slide adapted to operato the a nd haring a cam guide the length of 'which corresponds with the extent-of movement of said slide` a rotarvcartridige magazine, a feed pa'wl for rotating the cartridge maga,- zne to thereby feed cartridges to the breech incclianism, means-for actuating said f eed guide to stop the rota-V eartridges to the breech seV breech mechanism pawl, said means having a projection in con'- tinuous engagement. with said cam guide, a stopping pawl controlled bythe cam guide to stop the forward rotation of the cartridge niagazineyand a detent p'awl engaginglthe cartridge magazine to prevent bachward. movement.v thereof.

l2-Ina gni1, tl iecombination of breech mechanism, a. rotary cartridge'.inagazine, a recil'irocating operating slide adapted to opcrate thebreech. mechanism and haring i cani guide .the length ot'- which corresponds with the extent. of movement of said slide, a4 feedpawl for rotating the cartridge magazine to thereby feed cartridges to the breech mechanism, 'means for-actuating said feed pa'wLfsaid means haring' a-projection in cQnt-inlions engagement with said cani guide, a'inovable abutment located in the .path ,of i'i'iovement of the cartridges, a 4springfor forcing said 'abutmentin 'a direction opposite tothat in which the cartridges move'and tlie .1"or.ce ot.' :which islorercoine by force .transmitted through :cachvsuccessive cartridge after it` has come -intocontact with said abutment and dnringthe final forward movement -of the cartridge,saidpabntinent -v being opcratcdentirely-byengagement otthe successive cartridges therewith-` and not otherwise, and 'being entirely independent of aiiynmoving-part of the mechanism of the .gung and a detent pawl engaging the -eartricl'ge magazine to prevent rearward morenient thereof.

13. Ina gun, the combination 4of breech mechanism, a reciprocating,Y operatingslide adapted' tooperate` the breech mechanism ancthaiing a cam guide the length of which corresponds to the extent of movement of 40' saicl`slide 'arotary cartridge magazine, a teedqia'wl for rotating the cartridge ina-gm zine to thereby feed cartridges to tliebreech mechanism7 means for actuating said feed paivl, said means having a projection in con tinnous engagement. with said cam guide,A a morable. abut-ment located inthe Apath of movement.. of the cartridges, a spring for forcing'. said 'almtinei1t in a direction oppoj 'sitel to that rin. which the cartridges more and the torce of which ism-'creeme by force transmitted lthrough cachsuccessive cartridfze 'afterit has .come`into contact with said' abutment and duringthe final forward movement of thecai'tridge, said abutment being operated entirelyby engagement of the successive cartridges therewith, and not ot.her1wise. and heiniv entirely independent of anyinoving.part of the mechanism of the gainand a stopping pawl controlled -by -the cainguide to'stop a" further movement of thecartridge magazine on the completion of itsforward movement.

lsbinf 'a1 gainA the combination -ot breechl mechanism, a' reciprocating operating slide BEST AvAiLABLe COPY :tra

adapted to operate the breech mechanism and lia-ving a cam guide the length of which corresponds withthe' extent ot movement o- Said slide, a rotary cartridge niagai/liiieaiid feed pawl for rotating thecartridge :ma-taf zine to thereby feed cartridges to the-breech 7.0 mechanism, ii'xeans vfor actuatingf'said e'edi. if*

pawl said means having'a projection-I ir con tinuo-us 4engagementwith said cam gilidefa movable abutinent'located in the' path movement of the cartridges, a springhi -foi'cingsaid abutment in a directiono'ppsite to that in which th'e cartridges n'iov'e v'andi the torce -o-f which -i's overcome by forcetransmitted througheach snceessivec'ii. tridnje after it has come into contact"-witlio said abutment and during the final. forward ."H movement of thecartridge,"said abutment" being. .operated entirely by .engagement?ofg the successive cartridges therewith, and' noti-1 otherwise, and being. entirely indepcndentfn of any moving part of the mechanism 'of the grana stopping pawl control-led by the cain4 guide to stop a further. forward movement-f4 c-f the cartridge inaga'zineon. the' 'compter tion, of its forward movement, and a' deten.t-""90 pawl engaging the cartridge magazineTte:r "il" prevent rearward movement thereot'. :i

lln a gun, a .cartridge-feed mechaf" nism comprising a. stationary 4ine-mber'hav.-

ing a helical -way .adapted to guide the car- '95 i tridqes and a@ rotary member. concentric. with the stationary-member provided with means for engaging' the cartridges to inovethem in a helical path eonc'entricnitli the-' stationary member, cam ,operated means for .100

rotating the rotary member, and a yieldingabntinent independent of therotating means arranged in the-path of movementA of-thew cartridges.l

16. In a gun, a cartridge feed mechanjsm .f105.

comprising a stationary member hai-'ing'-i helical way adapted to guide the cartridge and a rotary member concentric witl lth 1 stationary meinberprovided with iiic:\iis'- f, n"-

engaging thecartridges tomove' them 4infa ;11 0 helical path concentric with the stationary. f'

member, cain o erated .means for. rotating the rotary inem ver, a yielding abutment .n1-1.... dependent of the rotating; means arranged .in-.-.

the `path of movement. ofgthe cartridgegaildllaga to prevent backward movement.`

17. In a gun, a cartridge feed mechanism comprising a stationary .member liax'ino "i helical way'a-dapted (o guide'thecartridg' and a rotary member concenrtic witlr the- Statonarymember provided with means foi engaging the cartridges to more thcnq,\ in-a helical path concentric with the stationary member, .a feed pawl for rota-ting the rot f member, a cam for operating the feed p ur. l, a yielding abutmentindependent of therotating means arranged inv the. path ot' 1novei a. detent pawl engagingthe rotary member. 

